treewide: convert bd_t to struct bd_info by coccinelle

The Linux coding style guide (Documentation/process/coding-style.rst)
clearly says:

  It's a **mistake** to use typedef for structures and pointers.

Besides, using typedef for structures is annoying when you try to make
headers self-contained.

Let's say you have the following function declaration in a header:

  void foo(bd_t *bd);

This is not self-contained since bd_t is not defined.

To tell the compiler what 'bd_t' is, you need to include <asm/u-boot.h>

  #include <asm/u-boot.h>
  void foo(bd_t *bd);

Then, the include direcective pulls in more bloat needlessly.

If you use 'struct bd_info' instead, it is enough to put a forward
declaration as follows:

  struct bd_info;
  void foo(struct bd_info *bd);

Right, typedef'ing bd_t is a mistake.

I used coccinelle to generate this commit.

The semantic patch that makes this change is as follows:

  <smpl>
  @@
  typedef bd_t;
  @@
  -bd_t
  +struct bd_info
  </smpl>

Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
diff --git a/common/bootm_os.c b/common/bootm_os.c
index a3c360e..6a95e0d 100644
--- a/common/bootm_os.c
+++ b/common/bootm_os.c
@@ -61,7 +61,7 @@
 static int do_bootm_netbsd(int flag, int argc, char *const argv[],
 			   bootm_headers_t *images)
 {
-	void (*loader)(bd_t *, image_header_t *, char *, char *);
+	void (*loader)(struct bd_info *, image_header_t *, char *, char *);
 	image_header_t *os_hdr, *hdr;
 	ulong kernel_data, kernel_len;
 	char *cmdline;
@@ -109,7 +109,7 @@
 			cmdline = "";
 	}
 
-	loader = (void (*)(bd_t *, image_header_t *, char *, char *))images->ep;
+	loader = (void (*)(struct bd_info *, image_header_t *, char *, char *))images->ep;
 
 	printf("## Transferring control to NetBSD stage-2 loader (at address %08lx) ...\n",
 	       (ulong)loader);
@@ -155,7 +155,7 @@
 static int do_bootm_rtems(int flag, int argc, char *const argv[],
 			  bootm_headers_t *images)
 {
-	void (*entry_point)(bd_t *);
+	void (*entry_point)(struct bd_info *);
 
 	if (flag != BOOTM_STATE_OS_GO)
 		return 0;
@@ -167,7 +167,7 @@
 	}
 #endif
 
-	entry_point = (void (*)(bd_t *))images->ep;
+	entry_point = (void (*)(struct bd_info *))images->ep;
 
 	printf("## Transferring control to RTEMS (at address %08lx) ...\n",
 	       (ulong)entry_point);